/Engine/Plugins/Enterprise/DatasmithImporter/Source/ExternalSource/Public/ExternalSource.h
Load the external source and return a validIDatasmithSceneTSharedPtrif successful. TheFExternalSourcemust have theFExternalSourceCapabilities::bSupportSynchronousLoadingenabled to call this.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IDatasmithScene](API\Runtime\DatasmithCore\IDatasmithScene) > Load()